---
title: "web_custom40.config File for Cloud Sites"
source: "https://docs.nexcess.com/hosting/cloud-sites/asp-net-and-iis/web_custom40-config-file-for-cloud-sites/"
description: "Add this code to your web.config file to run applications in medium trust. Review the article to confirm its suitability."
vertical: "Hosting"
date: "2024-03-04"
last_modified: "2026-06-30"
---
# web_custom40.config File for Cloud Sites
This addition to your web.config file allows you to run applications in medium trust, as discussed in our article [Running Applications Under Medium Trust in Cloud Sites](https://www.liquidweb.com/help-docs/running-applications-under-medium-trust-in-cloud-sites/). Before using the code example below, please read through the article to determine if this is the appropriate action to take. The code below is **only** an example, your specific site may require a different configuration. We recommend speaking with your developer before implementing any scripts. If you do copy/paste this code, it must be saved as a .config file only.As outlined in our [Terms of Service](https://www.liquidweb.com/policies/terms-of-service/) and [Cloud Sites Spheres of Support Expectations](https://www.liquidweb.com/help-docs/cloud-sites-spheres-of-support-expectations/), we are unable to help troubleshoot code issues and the example provided below is only for your own troubleshooting purposes.
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```